| /* |
| * |
| * Copyright 2016 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <grpc/grpc.h> |
| #include <grpc/grpc_security.h> |
| #include <grpc/support/log.h> |
| |
| #include "src/core/lib/iomgr/load_file.h" |
| #include "src/core/lib/security/credentials/credentials.h" |
| #include "src/core/lib/security/transport/security_connector.h" |
| #include "test/core/end2end/data/ssl_test_data.h" |
| #include "test/core/util/memory_counters.h" |
| #include "test/core/util/mock_endpoint.h" |
| |
| bool squelch = true; |
| // ssl has an array of global gpr_mu's that are never released. |
| // Turning this on will fail the leak check. |
| bool leak_check = false; |
| |
| static void discard_write(grpc_slice slice) {} |
| |
| static void dont_log(gpr_log_func_args* args) {} |
| |
| struct handshake_state { |
| bool done_callback_called; |
| }; |
| |
| static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg, |
| grpc_error* error) { |
| grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg); |
| struct handshake_state* state = |
| static_cast<struct handshake_state*>(args->user_data); |
| GPR_ASSERT(state->done_callback_called == false); |
| state->done_callback_called = true; |
| // The fuzzer should not pass the handshake. |
| GPR_ASSERT(error != GRPC_ERROR_NONE); |
| } |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| struct grpc_memory_counters counters; |
| if (squelch) gpr_set_log_function(dont_log); |
| if (leak_check) grpc_memory_counters_init(); |
| grpc_init(); |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| grpc_resource_quota* resource_quota = |
| grpc_resource_quota_create("ssl_server_fuzzer"); |
| grpc_endpoint* mock_endpoint = |
| grpc_mock_endpoint_create(discard_write, resource_quota); |
| grpc_resource_quota_unref_internal(&exec_ctx, resource_quota); |
| |
| grpc_mock_endpoint_put_read( |
| &exec_ctx, mock_endpoint, |
| grpc_slice_from_copied_buffer((const char*)data, size)); |
| |
| // Load key pair and establish server SSL credentials. |
| grpc_ssl_pem_key_cert_pair pem_key_cert_pair; |
| grpc_slice ca_slice, cert_slice, key_slice; |
| ca_slice = grpc_slice_from_static_string(test_root_cert); |
| cert_slice = grpc_slice_from_static_string(test_server1_cert); |
| key_slice = grpc_slice_from_static_string(test_server1_key); |
| const char* ca_cert = (const char*)GRPC_SLICE_START_PTR(ca_slice); |
| pem_key_cert_pair.private_key = (const char*)GRPC_SLICE_START_PTR(key_slice); |
| pem_key_cert_pair.cert_chain = (const char*)GRPC_SLICE_START_PTR(cert_slice); |
| grpc_server_credentials* creds = grpc_ssl_server_credentials_create( |
| ca_cert, &pem_key_cert_pair, 1, 0, nullptr); |
| |
| // Create security connector |
| grpc_server_security_connector* sc = nullptr; |
| grpc_security_status status = |
| grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc); |
| GPR_ASSERT(status == GRPC_SECURITY_OK); |
| grpc_millis deadline = GPR_MS_PER_SEC + grpc_exec_ctx_now(&exec_ctx); |
| |
| struct handshake_state state; |
| state.done_callback_called = false; |
| grpc_handshake_manager* handshake_mgr = grpc_handshake_manager_create(); |
| grpc_server_security_connector_add_handshakers(&exec_ctx, sc, handshake_mgr); |
| grpc_handshake_manager_do_handshake( |
| &exec_ctx, handshake_mgr, mock_endpoint, nullptr /* channel_args */, |
| deadline, nullptr /* acceptor */, on_handshake_done, &state); |
| grpc_exec_ctx_flush(&exec_ctx); |
| |
| // If the given string happens to be part of the correct client hello, the |
| // server will wait for more data. Explicitly fail the server by shutting down |
| // the endpoint. |
| if (!state.done_callback_called) { |
| grpc_endpoint_shutdown( |
| &exec_ctx, mock_endpoint, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close")); |
| grpc_exec_ctx_flush(&exec_ctx); |
| } |
| |
| GPR_ASSERT(state.done_callback_called); |
| |
| grpc_handshake_manager_destroy(&exec_ctx, handshake_mgr); |
| GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "test"); |
| grpc_server_credentials_release(creds); |
| grpc_slice_unref(cert_slice); |
| grpc_slice_unref(key_slice); |
| grpc_slice_unref(ca_slice); |
| grpc_exec_ctx_flush(&exec_ctx); |
| |
| grpc_shutdown(); |
| if (leak_check) { |
| counters = grpc_memory_counters_snapshot(); |
| grpc_memory_counters_destroy(); |
| GPR_ASSERT(counters.total_size_relative == 0); |
| } |
| return 0; |
| } |